The embodiment of the present invention provides a method and device for processing the anomaly of a network communication function and a mobile terminal, wherein the method may include: detecting whether an anomaly occurs to the dedicated bearing processing of a modem of the mobile terminal; if so, turning off a first protocol stack causing the current anomaly in the modem and starting a second protocol stack, wherein the modem supports at least two protocol stacks; recording the current attribute of the mobile terminal if the mobile terminal succeeds in network registration based on the second protocol stack; and if the mobile terminal fails in network registration based on the second protocol stack, restoring the on/off state of a default protocol stack in the at least two protocol stacks supported by the modem, and/or resetting the modem. The method and device can perform targeted anomaly processing according to an anomaly reason, restore the network use of the mobile terminal, improve the practicability of the anomaly processing, and improve convenience.